Stall converter "flash" rpm
I've got a transmission specialties 10 inch 3000 stall converter that flashes to 3800 in drive while cruising at 55-60mph before it pulls. Footbrake flash stall is about 3200. (it's hard to tell cause it burns the tires) It pulls hard if I stay in it through the gears. Is this just a loose converter? Am I overpowering the converter? Is it maybe a trans problem? Just seems like lost forward momentum. (3500 lb car, 450-475hp small block, th350,4:11,28 inch drag radial) Thanks in advance.